ΔE 22.2, loose: different enough that you should pick on purpose. Faded Plum is much more muted, cooler than Emperor's Children.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Faded Plum is much more muted, cooler than Emperor's Children.
The same difference applies the other way round: Emperor's Children is much more saturated, warmer.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Emperor's Children on the colour wheel See Faded Plum on the colour wheel
All matches: Emperor's Children equivalents · Faded Plum equivalents